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STM32L reuse of JTAG pins (specifically PA15) crashes SWD interface

Question asked by huska.andy on Dec 30, 2011
Latest reply on Jan 22, 2015 by zarudzki.mateusz
I am programming and debugging an STM32L (STM32L151C6U6) via SWD.  I can successfully reuse pins PB3 and PB44, and I can successfully set PA15 (JTAG TMI) to be GPIO input, but when I set it to be an output the SWD interface fails (or the core crashes, not sure).  I can't find any errata or information on this topic, but it is a major roadblock because I'm out of GPIO and this is my USB pullup!  Any advice appreciated.